| Patents for F16L 9 - Rigid pipes (18,006) |
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| 03/20/1997 | DE19637925A1 Plastic fuel pipe useful esp. for reduced prod. wall thickness |
| 03/19/1997 | CN2249851Y Anti-blocking joint for drainage |
| 03/19/1997 | CN2249850Y Large diameter thermal insulating pipes working at high temperature |
| 03/18/1997 | US5611453 Vessel formed of polymeric composite materials |
| 03/18/1997 | US5611373 Vapor barrier layer of metal coated polyethylene terephthalate material |
| 03/12/1997 | EP0762032A2 Multi-layer pipe |
| 03/12/1997 | EP0760898A1 Double walled insulated tubing and method of installing same |
| 03/12/1997 | EP0746442A4 Dual bias weld for continuous coiled tubing |
| 03/12/1997 | EP0584298B1 Elongated housing of large cross-section and its fabrication method |
| 03/06/1997 | DE19532681A1 Mounting for fastening ventilation or cable channels to walls |
| 03/05/1997 | EP0760068A1 Process for forming pipe of improved construction |
| 03/05/1997 | CN2248814Y Dual route blocking-proof 90 deg. elbow pipe joint assembly |
| 03/05/1997 | CN2248813Y plastic sleeved protection soft tube for automobile |
| 03/05/1997 | CN1144314A Method for manufacturing boron mud high temp. coating oxygen lance |
| 03/05/1997 | CN1034193C Compound tube and making method thereof |
| 02/27/1997 | WO1997001429A3 An extrusion apparatus and method, a tubular product, and a pipe |
| 02/26/1997 | EP0759136A1 Extruded multiple plastic layer coating bonded to a metal tube and process for making the same |
| 02/26/1997 | EP0617644B1 Blast nozzle for high-pressure cleaning equipment |
| 02/26/1997 | CN2248280Y Insulation wind pipe |
| 02/26/1997 | CN1034137C Seamless aluminium alloy pipe for tap water and water heating |
| 02/25/1997 | CA2021852C Flexible ducting |
| 02/18/1997 | US5604278 A blend for extrusion of pipe comprising an acrylic polymeric impact modifier graft copolymers; tensile strength, heat resistance |
| 02/18/1997 | US5603998 CPVC compounds and articles made therefrom for design stress rating above 180° C. |
| 02/18/1997 | US5603358 Flexible cylindrical tube for conducting gas |
| 02/12/1997 | EP0757767A1 Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids |
| 02/12/1997 | CN1142582A Pipe screw joint |
| 02/12/1997 | CN1142434A Synthetic resin corrugated pipe having concave-convex surface |
| 02/11/1997 | US5601893 Flexible metal pipes with a shrinkable polymer sheath, a process for their fabrication, and their utilization as flexible tubular conduits |
| 02/11/1997 | US5601890 Heat sealable, discoloration inhibition, heat shrinkable; electrosurgical instrument |
| 02/06/1997 | WO1997004265A1 Steel pipe with integrally formed liner and method of fabricating the same |
| 02/06/1997 | WO1997004264A1 Fuel transporting pipe |
| 02/06/1997 | CA2225854A1 Steel pipe with integrally formed liner and method of fabricating the same |
| 02/05/1997 | EP0756682A1 Method for making upset ends on metal pipe and resulting product |
| 02/05/1997 | CN2246742Y High-strength anti-corrosion compound tube |
| 02/05/1997 | CN1142031A Sewer of glass-fiber reinforced plastics composite material |
| 01/30/1997 | WO1997002945A1 Sandwich structure |
| 01/30/1997 | CA2226383A1 Sandwich structure |
| 01/29/1997 | EP0755493A1 Corrugated polymeric tubing having at least three layers with at least two respective layers composed of polymeric materials dissimilar to one another |
| 01/29/1997 | CN2246228Y Energy-saving fast sewer |
| 01/29/1997 | CN1141408A Bellows pipe and method of mfg. same |
| 01/28/1997 | US5597985 Acoustically inactive corrugated structure |
| 01/23/1997 | DE19542335A1 Flexible sleeve, eg for supplying gas into home |
| 01/22/1997 | EP0754898A1 Coolant hose |
| 01/22/1997 | EP0754897A1 Fuel conducting pipe |
| 01/22/1997 | EP0739468A4 Reinforced flexible corrugated tubing |
| 01/21/1997 | US5595800 Helically wound reinforced ribbed composite structure |
| 01/21/1997 | CA2181651A1 Reinforced polyethylene pipe and method of manufacture |
| 01/16/1997 | WO1997001429A2 An extrusion apparatus and method, a tubular product, and a pipe |
| 01/16/1997 | WO1997001428A1 Extrusion apparatus and method for orienting plastic material by using an extrusion apparatus |
| 01/16/1997 | CA2233030A1 A tubular product and an extrusion apparatus and method |
| 01/16/1997 | CA2225419A1 An extrusion apparatus and method, a tubular product, and a pipe |
| 01/15/1997 | EP0668978B1 Multilayer fire protective coating |
| 01/14/1997 | US5593744 Hollow reinforcing members and composites containing the same |
| 01/14/1997 | EP0760068A4 Process for forming pipe of improved construction |
| 01/14/1997 | CA2133665C Multilayer plastic duct |
| 01/08/1997 | CN1139615A Method and installation for production of multilayer pipe of thermoplastic material, in particular polyolefine |
| 01/08/1997 | CN1139596A Multi wrapping metal tube and making method and equipment |
| 01/07/1997 | US5591497 Chlorinated polyvinyl chloride rigid pipe and method of forming such pipe |
| 01/07/1997 | US5590691 For use in brake and fuel lines |
| 01/03/1997 | WO1997000402A1 Ceramic heat exchanger |
| 01/02/1997 | EP0727023A4 Secondary containment flexible underground piping system |
| 12/31/1996 | US5589127 Method and apparatus for forming ribs with sideward projections in a plastic pipe, and a plastic pipe |
| 12/27/1996 | EP0749546A1 Flexible metal pipes comprising a shrinkable polymer sheath |
| 12/25/1996 | CN2243592Y Sound and heat insulating composite ventilating pipe |
| 12/18/1996 | EP0748934A2 A pipe assembly |
| 12/18/1996 | EP0670019A4 Self locking slitted corrugated tubing. |
| 12/18/1996 | CN1137974A Polyamide-based pipes for conveying petrol |
| 12/11/1996 | EP0746716A1 Cold-formable composite pipe |
| 12/11/1996 | EP0746442A1 Dual bias weld for continuous coiled tubing |
| 12/11/1996 | CN2242385Y Cast iron pipe lined with resin in inner |
| 12/10/1996 | US5582440 Segmented header pipe for industrial pretreatment washers |
| 12/04/1996 | EP0745201A1 Hollow reinforcing members and composites containing the same |
| 12/03/1996 | US5579809 Reinforced composite pipe construction |
| 11/28/1996 | WO1996037721A1 Piping |
| 11/28/1996 | WO1996037321A1 Method of casting a multilayered alloy tube |
| 11/28/1996 | DE19519111A1 Rohrleitung Pipeline |
| 11/27/1996 | EP0743894A1 Process for producing corrugated multi-layer tubing having layers of differing plastic characteristics |
| 11/27/1996 | CN2241256Y Metal pipe with spiral concavo-convex slot |
| 11/21/1996 | WO1996036830A1 Pipeline made from extruded plastic composite piping with a sleeve connection |
| 11/20/1996 | CN1136290A Dual bias weld for continuous coiled tubing |
| 11/19/1996 | US5576082 Wood tubing |
| 11/19/1996 | US5575131 Multiple use corner clip |
| 11/13/1996 | EP0741848A1 Pipes for systems used in motor vehicles and process for producing the same |
| 11/13/1996 | CN2240093Y Flanged coupling insulating, silencing ventilating pipe |
| 11/13/1996 | CN2240092Y Stainless steel composite steel pipe |
| 11/12/1996 | US5573040 Interlocked plastic-encased concrete pipe |
| 11/12/1996 | US5573038 Pressure-resistant helical corrugated pipe including a thin metal reinforcing plate |
| 11/07/1996 | WO1996035069A1 A thin walled tube having an internal rib |
| 11/07/1996 | WO1996034708A1 Process for sheathing a plastic pipe with a metal sheath |
| 11/07/1996 | DE19616326A1 Corrosion- and chip-resistant resin coating system for stainless steel pipe |
| 11/07/1996 | DE19536219C1 Hydraulic line with integrated feedback path e.g. for actuator drive of turbomachines |
| 11/07/1996 | CA2217282A1 A thin walled tube having an internal rib |
| 11/06/1996 | EP0741261A1 Screw connection for pipes |
| 11/06/1996 | EP0740754A1 Petrol supply tube |
| 11/06/1996 | CN2239556Y Multifunctional clad pipe |
| 11/05/1996 | US5571583 Injection spin molding process and articles made therewith |
| 11/05/1996 | US5570711 Composite and tie layer therefor |
| 10/31/1996 | WO1996034222A1 Laminated fuel line and connector |
| 10/31/1996 | DE19515403A1 Tubular wall bushing for cables or pipes such as power, communications and water and waste pipes |
| 10/30/1996 | EP0739937A2 Tube made from polyethylene having improved mechanical properties |